Lock



FIG. 1 is a front perspective view of a lock showing the new design;

FIG. 2 is a top view of the lock of FIG. 1;

FIG. 3 is a front view of the lock of FIG. 1;

FIG. 4 is a bottom view of the lock of FIG. 1;

FIG. 5 is a rear view of the lock of FIG. 1;

FIG. 6 is a left side view of the lock of FIG. 1; and,

FIG. 7 is a right side view of the lock of FIG. 1.

The portions of the Figures shown in phantom lines either identify boundaries of the claimed design, or are for illustrative purpose only. In either case, the phantom lines form no part of the claimed design. 

We claim the ornamental design for a lock, as shown and described. 